Is it a katar dagger ?

[Kmaddock]

My observations, and they are not based on anything concrete

To me it looks as if a wooden handle would have gone around the cross bar below the blade.

To use as a weapon though a circular piece of timber would not be the best as the knife would not index very well to know where the point is
and also it could swivel in use, very easily.

blade does look very blade like though

and definitely looks as if it has some good age to it

any back story?

Ken